Flatnosed refers to a physical characteristic of having a flattened or depressed nose. There are various synonyms that can be used to describe a person's flatnosed feature. Some of the most common synonyms are, "nasally depressed" or "nasally deflected". Other terms that can be used to describe a flatnosed individual include "button-nosed", "snub-nosed", and "blunt-nosed". The word "pug" is also often used to describe a flatnosed animal, such as a pug dog. It's important to note that using synonyms can help vary and enrich your language while avoiding repetition in your writing or conversations.